Pulse Meter Selection

Select a pulse meter that is appropriately sized for the flow rate and pipe diameter of your application. Do not reduce the pipe size to accommodate a pulse meter, as this can lead to inaccurate measurements and system inefficiencies.

Common flow rate ranges for standard meter types include:

Metric	Imperial	Typical Flow*	Max Flow*	Units
12mm	1/2”	10	15	lpm
19mm	3/4”	30	40	lpm
25mm	1”	50	100	lpm
32mm	1 1/4”	100	140	lpm
40mm	1.5”	150	200	lpm
50mm	2”	250	400	lpm
80mm	3”	500	800	lpm

Note

Flow values are subject to fluid viscosity. Lubricants typically have a significantly higher viscosity than diesel, which may impact meter performance.

Fluid Compatibility

When selecting a pulse meter, make sure it is constructed from materials compatible with the specific fluid and operational environment.

• Diesel is compatible with aluminium meters and most common materials.
• AdBlue (DEF) must only be used with stainless steel meters to prevent corrosion or contamination.
• Specialised lubricants and chemicals may require meters made from specific materials—consult manufacturer specifications.
• Plastic or polymer-based meters may not be suitable for long-term use in harsh conditions due to wear and tear concerns.

Hall Effect Meters

Hall effect meters deliver consistent, reliable pulse outputs and are preferred for applications requiring high measurement confidence. These meters usually:

• Offer superior accuracy and repeatability over extended periods.
• Perform better in high-flow environments.
• Require external power supply to operate.

Note

For critical applications, a Hall effect meter is highly recommended.

Reed Meters

Reed meters are passive devices that do not require a power supply, making them a cost-effective option for basic measurement needs.

• Ideal for non-critical applications where high precision is not essential.
• Generally more affordable, but with lower long-term accuracy and repeatability.

Meter Display

In some installations—particularly retrofits—it is advisable to incorporate a digital meter display alongside the pulse meter.

• Digital pulse meters usually offer higher accuracy than mechanical counterparts
• Using a single digital display reduces the risk of discrepancies between multiple measurement sources
• Only one device requires calibration, simplifying ongoing maintenance and compliance